Eyeglass Reading Glasses

Reading glasses can hurt?
I am in my late 40s and my vision begins to descend. When I try to read a book, words are very fuzzy. I went to the pharmacy and bought some reading glasses with magnification of 1.25. These seem to help, but my brother seems to think that they could actually weaken / damage my eyes. He thinks I'd be much better to get prescription glasses. Then using reading glasses Drugstore hurt?
